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We present a study of a young (few years old) supernova remnant 2003lx whichwas first discovered in X-ray through two serendipitous Swift observations in2008 January and the corresponding merged image revealed a 7\sigma sourcedetection at $2.1\pm1.2$ arcsec (0.9 +/- 0.5 Swift pixels) from the opticalposition of the supernova. The X-ray luminosity $L_x = 4.8_{-1.7}^{+1.8} \times10^{41} erg/s of band 0.3 - 2.0 keV is estimated by a redshift z = 0.0377 powerlaw which can infer a companion star with a mass-loss rate of \dot{M} ~ 10^{-4}M_\sun per year (with assumption of wind velocity v_w = 10 km/s) in the whitedwarf binary system. Thermal Model fitting suggests the temperature of theshock wave front is kT ~ 0.4 keV which is consistent with the typical reverseshock temperate. The X-ray emission allows us to probe the interaction betweenthe fast moving debris of the exploded star and the circumstellar medium (CSM).This in turns provides footprints of the mass-loss history of the explodedsystem, and may allow us to learn about the nature of the progenitor and itscompanion.

Detections of X-ray emissions from Type Ia Supernova 2003lx